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EVAL-AD7329SDZ

更新时间： 2024-12-02 01:23:03
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亚德诺 - ADI /
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39页 843K
描述
1 MSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC

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1 MSPS, 8-Channel, Software-Selectable,  
True Bipolar Input, 12-Bit Plus Sign ADC  
Data Sheet  
AD7329  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
MUX  
+
MUX  
–
OUT  
REF /REF  
IN OUT  
ADC  
–
ADC  
+
V
V
CC  
OUT  
IN  
IN  
DD  
12-bit plus sign SAR ADC  
True bipolar input ranges  
2.5V  
VREF  
Software-selectable input ranges  
10 V, 5 V, 2.5 V, 0 V to +10 V  
1 MSPS throughput rate  
8 analog input channels with channel sequencer  
Single-ended true differential and pseudo differential  
analog input capability  
V
V
V
V
V
V
0
1
2
3
4
5
IN  
IN  
IN  
13-BIT SUCCESSIVE  
APPROXIMATION  
ADC  
I/P  
MUX  
T/H  
IN  
IN  
IN  
V
V
6
7
IN  
IN  
DOUT  
SCLK  
High analog input impedance  
MUXOUT and ADCIN pins allow separate access to mux and ADC  
Low power: 21 mW  
CONTROL  
LOGIC AND  
REGISTERS  
CHANNEL  
SEQUENCER  
CS  
DIN  
AD7329  
Temperature indicator  
V
AGND  
V
DRIVE  
SS  
Full power signal bandwidth: 20 MHz  
Internal 2.5 V reference  
Figure 1.  
High speed serial interface  
iCMOS process technology  
24-lead TSSOP package  
Power-down modes  
GENERAL DESCRIPTION  
PRODUCT HIGHLIGHTS  
The AD73291 is an 8-channel, 12-bit plus sign successive  
approximation ADC designed on the iCMOS™ (industrial  
CMOS) process. iCMOS is a process combining high voltage  
CMOS and low voltage CMOS. It enables the development of  
a wide range of high performance analog ICs capable of 33 V  
operation in a footprint that no previous generation of high  
voltage parts could achieve. Unlike analog ICs using conventional  
CMOS processes, iCMOS components can accept bipolar input  
signals while providing increased performance, dramatically  
reduced power consumption, and reduced package size.  
1. The AD7329 can accept true bipolar analog input signals,  
± 1 ꢀ V, ± ± V, ± 2 . ± V, a n d ꢀ V to + 1 ꢀ V u n ip o l ar s i g n a l s .  
2. The eight analog inputs can be configured as eight single-  
ended inputs, four true differential input pairs, four pseudo  
differential inputs, or seven pseudo differential inputs.  
3. 1 MSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™-  
compatible interface.  
4. Low power, 21 mW, at 1 MSPS.  
±. The MUXOUT± and ADCIN± pins allow for signal conditioning  
of the mux output prior to entering the ADC.  
The AD7329 can accept true bipolar analog input signals. The  
AD7329 has four software-selectable input ranges: ±1ꢀ V, ±± V,  
±2.± V, and ꢀ V to +1ꢀ V. Each analog input channel can be  
independently programmed to one of the four input ranges.  
The analog input channels on the AD7329 can be programmed  
to be single-ended, true differential, or pseudo differential.  
Table 1. Similar Devices  
Device  
Number  
AD7328  
AD7327  
AD7324  
AD7323  
AD7322  
AD7321  
Throughput Rate  
1000 kSPS  
500 kSPS  
Number of Channels  
8
8
4
4
2
2
1000 kSPS  
500 kSPS  
The ADC contains a 2.± V internal reference. The AD7329 also  
allows for external reference operation. If a 3 V reference is  
applied to the REFIN/REFOUT pin, the AD7329 can accept a true  
bipolar ±12 V analog input. The ADC has a high speed serial  
interface that can operate at throughput rates up to 1 MSPS.  
1000 kSPS  
500 kSPS  
1 Protected by U.S. Patent No. 6,731,232.  
Rev. C  
Document Feedback  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 ©2006–2014 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
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